Infrared diode laser study of the kinetics of the NCCO + O2 reaction

Infrared diode laser spectroscopy was used to probe the kinetics of the NCCO + O2 reaction. Several NCCO transitions were detected at 1887–1890 cm−1, in good agreement with a recent high-level calculation for the ν2 fundamental vibrational frequency. The total rate constant of the NCCO + O2 reaction was measured to be (5.2 ± 0.5) × 10−13 cm3 molecule−1 s−1 at 2 Torr pressure of N2. The NCO + CO2 product channel was detected for the first time by probing 18OC16O products from NCCO + 18 O 2 . The branching ratio for this channel was estimated to be 0.28 ± 0.06 at 3.2 Torr total pressure.